416 results found
    1. Cell Biology
    2. Immunology and Inflammation

    Arp2/3 complex-driven spatial patterning of the BCR enhances immune synapse formation, BCR signaling and B cell activation

    Madison Bolger-Munro et al.
    Arp2/3 complex-mediated actin polymerization shapes how B lymphocytes probe the surface of antigen-presenting cells, promotes coalescence of B cell receptor (BCR) microclusters, amplifies BCR signaling, and enhances B cell activation.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Mechanism of synergistic activation of Arp2/3 complex by cortactin and N-WASP

    Luke A Helgeson, Brad J Nolen
    Single-molecule TIRF microscopy, biochemical assays and mathematical modeling demonstrate how actin-branch nucleation by the Arp2/3 complex is coordinately regulated by two biochemically distinct activators.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Three-color single molecule imaging shows WASP detachment from Arp2/3 complex triggers actin filament branch formation

    Benjamin A Smith et al.
    New insights into the mechanism responsible for the nucleation of branches on networks of actin filaments shed light on a process that is essential for eukaryotic cell motility and endocytosis.
    1. Structural Biology and Molecular Biophysics

    Rac1 GTPase activates the WAVE regulatory complex through two distinct binding sites

    Baoyu Chen et al.
    The cryo-electron microscopy structure of an assembly of the WAVE Regulatory Complex and its activator, the Rac GTPase, plus complementary biochemistry and biophysics, reveal a novel activation mechanism involving two distinct Rac binding sites.
    1. Microbiology and Infectious Disease

    A divergent cyclin/cyclin-dependent kinase complex controls the atypical replication of a malaria parasite during gametogony and transmission

    Aurélia C Balestra et al.
    Multiple steps of the atypical cell cycles underlying Plasmodium gametogony are controlled by a divergent cyclin/cyclin-dependent complex.
    1. Cell Biology
    2. Immunology and Inflammation

    Formin-like 1 mediates effector T cell trafficking to inflammatory sites to enable T cell-mediated autoimmunity

    Scott B Thompson et al.
    Lymphocyte migration and autoimmunity induction rely on Formin-like 1-mediated actin network remodeling to push the lymphocyte nucleus through restrictive endothelial barriers.
    1. Developmental Biology

    Lin28a/let-7 pathway modulates the Hox code via Polycomb regulation during axial patterning in vertebrates

    Tempei Sato et al.
    Genetic analyses reveal that the loss of Lin28a causes axial shortening with mild skeletal transformations via decreased PRC1 at Hox genes, establishing a new pathway in the “Hox code.”.
    1. Cell Biology
    2. Computational and Systems Biology

    DASC, a sensitive classifier for measuring discrete early stages in clathrin-mediated endocytosis

    Xinxin Wang et al.
    A new user-intervention-free classification, using single-fluorescent markers, measures conventionally unmeasureable phenotypes in early stages during clathrin-mediated endocytosis.
    1. Cell Biology
    2. Microbiology and Infectious Disease

    A single-parasite transcriptional atlas of Toxoplasma Gondii reveals novel control of antigen expression

    Yuan Xue et al.
    Single-cell RNA-sequencing resolves the transcriptional landscape of asexual development in Toxoplasma gondii, revealing concerted genetic programs to Plasmodiumfalciparum and a novel transcriptional factor that controls antigen switching.
    1. Evolutionary Biology
    2. Plant Biology

    Independent evolution of ancestral and novel defenses in a genus of toxic plants (Erysimum, Brassicaceae)

    Tobias Züst et al.
    A gain-of-function in a new chemical defense resulted in no trade-offs and and independent evolution between novel and ancestral defenses, suggesting low redundancy among different defensive chemicals.

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